A feature that used to work suddenly broke. The problem? There were 300 commits since the last time I knew it worked. Checking each commit manually would take forever. Fortunately, Git has a tool...
How to Use Git Bisect to Pinpoint Bugs Precisely
A feature that used to work suddenly broke. The problem? There were 300 commits since the last time I knew it worked. Checking each commit manually would take forever. Fortunately, Git has a tool...
Syncing LDAP Users & Groups with the Icinga Notifications Web API
If you're running Icinga in a mid-to-large organization, chances are your users and teams are already defined in LDAP or Active Directory. Manually re-creating contacts and contact groups in Icinga Notifications Web is tedious and error-prone, but thankfully, it...
How to undo Git reset hard?
You just finished a long interactive rebase. You hit enter. Your commit history looks… wrong. There is a bunch of things that could go wrong: messed up an interactive rebase accidentally ran git reset --hard merged the wrong branch rebased onto the wrong base You...
Icinga 2 DSL – Variable Scopes
Ever wondered how Icinga 2 manages all those variables, and how it knows which one to use? In this blog post, we will explore all the different variable scopes in Icinga 2, and by the end, you will know what this mysterious error message means when you see it in your...
How To Pick The Correct Metrics For Your Monitoring
This is a guest blogpost by Adam Sweet from the Icinga Partner Transitiv Technologies. Since this is a longer post, we added a tl;dr at the end. For many, host and application monitoring is an afterthought at the end of a project. Some people don’t think about...
Icinga 2 Insights With Event Streams
There are many ways to interact with the data that Icinga 2 collects, processes, and produces. The most common is probably Icinga Web, which displays checks in all the colors of a traffic light. Icinga 2 also comes with several metrics or performance data writers. But...
SSL Certificate Monitoring and Management
SSL certificates are the foundation of secure communication on the web. They protect data integrity, enable encryption, and verify identities. But even a single expired certificate can cause outages, lost trust, and serious security risks. Effective SSL certificate...
Managing Multiple Service Instances with a Systemd Generator
When working with systemd services in Linux, you might encounter situations where multiple instances of a service need to be managed dynamically. When I had to develop a solution to monitor multiple Kubernetes clusters with Icinga for Kubernetes, I ran into exactly...
How to do Agentless Monitoring with check_by_ssh
The fundamentals of Icinga 2 are check plugins. They are being executed and their return value is mapped to either Host or Service objects. Everything else follows on top. These check plugins can be either from the Monitoring Plugins or custom. While their origin does...
Monitoring the Monitoring: Demystifying the Icinga DB Health Check
In this post we will take a look at the icingadb check command built into Icinga 2 for monitoring the health of Icinga DB. If you have already configured it, this blog post will give you some insights on what it actually checks, otherwise, it showcases what useful...
Icinga Notifications – How to Set Up Desktop Alerts
We recently released the beta version of our Notification Web Module, which includes a cool feature that is not yet known to everyone. We named it Desktop Notifications (Browser Push Notifications). With this feature enabled, your browser can send you instant...
Getting Started with Icinga: Your All-in-One Guide to Mastering Monitoring
If you’re looking for a comprehensive guide to getting started with Icinga, you’re in the right place. Whether you're new to Icinga or a seasoned user who thinks they’ve seen it all, some of these resources could surprise you with a few tricks. Let's dive into the...
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